JRR4607 said:
This is the McLennan Co. s.o F3 PD 156.5700
here is the link
Waco, Texas scanning information
I strongly suggest your source is in error:
1) 156.57 is not an available frequency in either the pubilc safety pool (90.20) or the IB pool (90.35).
2) The FCC License Search database has no license record anywhere in Texas for 156.57.
3) There is a license for KUG472 issued to the McLennan County Sheriff's Office, for the following frequencies:
154.875 (FB2) and 155.37 (FB).
Your radio will accept 155.37 without issue.